1606412661 has 8 divisors (see below), whose sum is σ = 2447866944. Its totient is φ = 917950080.

The previous prime is 1606412629. The next prime is 1606412707. The reversal of 1606412661 is 1662146061.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1606412661 - 2⁵ = 1606412629 is a prime.

It is a super-2 number, since 2×1606412661² = 5161123274842201842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606412861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38247900 + ... + 38247941.

It is an arithmetic number, because the mean of its divisors is an integer number (305983368).

Almost surely, 2^1606412661 is an apocalyptic number.

It is an amenable number.

1606412661 is a deficient number, since it is larger than the sum of its proper divisors (841454283).

1606412661 is an equidigital number, since it uses as much as digits as its factorization.

1606412661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76495851.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1606412661 is about 40080.0781062113. The cubic root of 1606412661 is about 1171.1675735938.

The spelling of 1606412661 in words is "one billion, six hundred six million, four hundred twelve thousand, six hundred sixty-one".